topic Re: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modem in Connectivityhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163823#M53430
Just spitballimg... but double check your router's NAT acceleration options. May need to make sure Cut Through Forwarding (CTF) or something is enabled.Sun, 29 Sep 2019 17:55:19 GMTRAIST51502019-09-29T17:55:19ZSpectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163811#M53427
<P class="_1qeIAgB0cPwnLhDF9XSiJM">I recently upgraded from Spectrum's 200/10 tier to the Internet Gig 940/35 tier.</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">I've been going crazy the last few days, trying to achieve optimal performance when connected via my networking hardware. Namely, I cannot get proper, max throughput for download when a router is active between the Spectrum-provided DOCSIS 3.1 modem and my PC.</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM"><STRONG>Setup is as follows:</STRONG><BR />• Spectrum DOCSIS 3.1 Internet Gig modem connects to ASUS GT-AX11000 Wi-Fi 6 Router via CAT7 Ethernet Cable</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">• Desktop PC with Full Duplex 1 Gbps ethernet card connects to Asus GT-AX11000 Wi-Fi 6 router via CAT7 Ethernet Cable</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">When the above setup is active, I achieve<SPAN>&nbsp;</SPAN><A href="https://speedtest.net/" target="_blank" rel="noopener noreferrer">speedtest.net</A><SPAN>&nbsp;</SPAN>download speeds no higher than 400-410 Mbps, though upload does hit proper ceiling of ~40 Mbps. When the desktop is connected directly to the modem, the download maxes out at far closer to the ideal, clocking in around ~850 Mbps.</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">I've tried to troubleshoot with multiple routers—all flagship models across two manufacturers—all running current firmware, all factory reset to ensure no software conflict. Multiple ethernet cables tested, as well.</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">Does anyone have any idea what could be at a fault? More appropriately, anyone on the forum use Internet Gig in tandem with their own router and achieve 1:1 throughput to mirror what the modem directly provides?</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">From what I've come across on both the r/Spectrum and r/chartercable subreddits, this issue is fairly common when a user is presented with the need to run the Spectrum DOCSIS 3.1 modem alongside user-owned routers. Is there some sort of server-side throttling/throughput limitation in effect when a user does not directly connect to the modem or to a Spectrum-provided router?</P>Sun, 29 Sep 2019 01:18:08 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163811#M53427ArtemMoshkovich2019-09-29T01:18:08ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163817#M53428
<P><FONT face="arial,helvetica,sans-serif">Good morning.&nbsp;</FONT></P>
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<P><FONT face="arial,helvetica,sans-serif">No we do not throttle throughput when you are using your own router connected to our D3.1 modem.</FONT></P>
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<P><FONT face="arial,helvetica,sans-serif">Some information that would help to diagnose the issue can be found here:&nbsp;</FONT></P>
<P><FONT face="arial,helvetica,sans-serif"><A href="https://forums.timewarnercable.com/t5/Connectivity/DATA-TO-POST-TO-GET-HELP-FROM-THE-COMMUNITY/td-p/50743" target="_self">DATA-TO-POST-TO-GET-HELP-FROM-THE-COMMUNITY</A>&nbsp;</FONT></P>
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<P style="margin: 0in; font-family: Arial; font-size: 12.0pt;"><FONT face="arial,helvetica,sans-serif">Regards,</FONT></P>
<P style="margin: 0in; font-family: Arial; font-size: 12.0pt;"><FONT face="arial,helvetica,sans-serif">Julia</FONT></P>
<P style="margin: 0in; font-family: Arial; font-size: 12.0pt;"><FONT face="arial,helvetica,sans-serif">Social Media Customer Service-Lead Moderator</FONT></P>
<P>&nbsp;</P>Sun, 29 Sep 2019 12:50:21 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163817#M53428Julia_R2019-09-29T12:50:21ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163819#M53429
<P>Is any other device connected to the router when you are having these issues? Does the router have QoS or other data management system activated?&nbsp;</P>Sun, 29 Sep 2019 13:17:27 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163819#M53429reds911852019-09-29T13:17:27ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163823#M53430
Just spitballimg... but double check your router's NAT acceleration options. May need to make sure Cut Through Forwarding (CTF) or something is enabled.Sun, 29 Sep 2019 17:55:19 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163823#M53430RAIST51502019-09-29T17:55:19ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163829#M53431
<P class="_1qeIAgB0cPwnLhDF9XSiJM">I want to reiterate that the routers tested here are all flagship routers—Netgear Nighthawk R7000, Asus AX88U, and Asus GT-AX11000—and all should be able to sustain higher than ~400 Mbps download speed during a speed test. The Asus models are Wi-Fi 6 units, capable of multi-gig throughput when wireless or wired. Each device is run a clean, controlled state, with no other LAN ports/devices in use.</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">&nbsp;</P><P class="_1qeIAgB0cPwnLhDF9XSiJM">All routers are running up-to-date firmware, exhibit no hardware defect (monitored via individual core CPU usage in the GUI), are connected via CAT7 ethernet, and have all elective software/bandwidth regulation functions (including QoS) firmly disabled.</P>Mon, 30 Sep 2019 03:01:25 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163829#M53431ArtemMoshkovich2019-09-30T03:01:25ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163830#M53432
<P>Hi there,</P><P>&nbsp;</P><P>Both of the Asus Wi-Fi 6 units in use here (Asus AX88U and Asus GT-AX11000) are quad-core, hardware-intensive models with more than enough resources to handle single-gig WAN-to-LAN throughput.</P><P>&nbsp;</P><P>Both NAT Acceleration and CTF are enabled by default and hidden in the GUI.</P>Mon, 30 Sep 2019 03:03:03 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163830#M53432ArtemMoshkovich2019-09-30T03:03:03ZRe: Spectrum Internet Gig - Low throughput on download when connected via ethernet through modemhttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163835#M53433
Hmmm... curious indeed. NAT acceleration/QoS are usual suspects after cables/link speed negotiation.<BR /><BR />Perhaps a reset of the windows stack? Can try the TCP Optimizer over at speedguide.net to reset everything to winblows defaults with just a few mouse clicks (rightclick, run as admin so it can run the netsh commands properly and all)--will call for a reboot and will recheck for chimney and all that good stuff again.<BR /><BR />Worth a shot?Mon, 30 Sep 2019 07:27:25 GMThttps://forums.timewarnercable.com/t5/Connectivity/Spectrum-Internet-Gig-Low-throughput-on-download-when-connected/m-p/163835#M53433RAIST51502019-09-30T07:27:25Z